Preparation And Properties Of Catalytic Materials Containing Phosphonic Acid Group

With the growing shortage of oil resources and excessive consumption，Energysecurity environmental pollution and other issues are becoming common concerningproblems. To realize the sustainable development, ecological environment must beprotected while developing the economy. Developing renewable, low pollution,widely distributed and abundant biomass is becoming a hot topic in the world.Biodiesel is a kind of clean and renewable energy, it is biodegradable and can also becombusted completely and emit less harmful substances. So biodiesel is an excellentsubstitute for diesel fuel. To develop and use the biodiesel becomes the only way tosolve the shortage of resources, environmental pollution and achieve energyconservation and emissions reduction. At present, the main method of preparing thebiodiesel is the transesterification method. The key to make the preparation ofbiodiesel by ester exchange reaction is the selection of catalyst. Seeking a kind of highcatalytic, easy recycling, and environment friendly catalysts plays an important role inpromoting biodiesel to the industrialized production. Methyloleate is an importantcomponent of biodiesel, meanwhile it is also a kind of important chemical rawmaterial, which can be used for chemical additives, lubricant additives and weedingadditives. A large number of production of methyl oleate is also conducive topromoting the development of industry economy. The methyl oleate is preparedmainly through esterification reaction, and the key factor lies in the selection ofcatalyst.Organic phosphonic acid groups have strong coordination ability, which cancoordinate strongly with a lot of metal ions. Therefore phosphonic acid groups arewidely studied in crystallography, sewage treatment. However，it is less studied asacidic catalyst. In this article, organic phosphonic acid containing phosphate groups1-hydroxy benzyl phosphonic acid and modified silica ball phosphonic acid products was synthesized. Through1-hydroxy benzyl phosphonic acid ester exchange reactioncatalyzed synthesis, biodiesel was made using the Box-Behnken response surfacemethod to optimize the synthesis conditions. Methyloleate was synthesized by themodified silica balls product phosphonic acid catalytic esterification reaction and theBox-Behnken response surface method was used to optimize the synthesis conditions.1.With phosphorus trichloride as the phosphorus source,1-hydroxy benzylphosphonic acid was synthesized by the method of gradient temperature. Infraredspectrum, mass spectrometry, nuclear magnetic characterization were used tocharacterize them. With this organic phosphonic acid as catalyst, the Soybean oil wascatalyzed to synthesize biodiesel, in which process Box-Behnken principle was usedto optimize biodiesel synthesis condition. The results showed that has good catalyticactivity, easy separation. And the catalyst can be cleared out using ethyl acetate, evenafter being used6times, the yield reached above75%.2.Silica ball was synthesized using the classic Stober, and after silane coupling agentmodification, the surface contains amino modified silica ball was made, finallyphosphonic acid product was obtained by Mannich reaction. The product has beencharacterized with infrared spectrum, scanning electron microscopy (SEM), EDSenergy spectrum and thermogravimetric differential thermal mapping. The materialwith the phosphonic acid group on the surface, displays some certain acid property.Therefore, methyl oleate was synthesized with the product as acidic catalyst, and thereaction conditions were optimized through the response surface of the Box-Behnken.